@article{IM_1987__88_143448,
     author = {H. Kn\"orrer},
     title = {Cohen-Macaulay modules on hypersurface singularities {I.}},
     journal = {Inventiones mathematicae},
     pages = {153--164},
     publisher = {mathdoc},
     volume = {88},
     year = {1987},
     zbl = {0617.14033},
     url = {http://geodesic.mathdoc.fr/item/IM_1987__88_143448/}
}